the car have only 20000 miles it is a Charger SRT8 2012 with 6.4 Engine, so much smoke comming in 3 to 5 sec only and it disappears after?

 

Does it sit for a while between smoke events? If so, it my just be condensation. You can test the coolant for the presence of combustion gases though, which would indicate a head gasket problem..... Might consider doing that just for peace of mine. You can *rent* the test kits at most of the big chain auto parts stores.

 

What oes it smell like? It could be moisture, normal in cold weather. Excess fuel, not good. It might also be coolant, REALLY not good. My bet would be just moisture from the exhaust which is normal or a leaky fuel injector when it sits.

 

it's over now, i bought the car before 3 weeks ago, the owner before me he didn't drive it so much only 20000 miles in 8 years so its nothing danger. Thanks for the answer 🙂

 

Nothing danger, it's over now, i had more than seven SRT vehicles and never happened before with any one of them, the problem is our car mechanics in Sweden don't have the experience about the American cars so they can't answer me!
Thanks 🙂